1375789869 has 18 divisors (see below), whose sum is σ = 2000408046. Its totient is φ = 911133360.

The previous prime is 1375789837. The next prime is 1375789871. The reversal of 1375789869 is 9689875731.

It can be written as a sum of positive squares in only one way, i.e., 760104900 + 615684969 = 27570^2 + 24813^2 .

It is not a de Polignac number, because 1375789869 - 2⁵ = 1375789837 is a prime.

It is a super-2 number, since 2×1375789869² = 3785595527286074322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1375789369) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1496592 + ... + 1497510.

Almost surely, 2^1375789869 is an apocalyptic number.

It is an amenable number.

1375789869 is a deficient number, since it is larger than the sum of its proper divisors (624618177).

1375789869 is an frugal number, since it uses more digits than its factorization.

1375789869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2025 (or 1103 counting only the distinct ones).

The product of its digits is 22861440, while the sum is 63.

The square root of 1375789869 is about 37091.6414977822. The cubic root of 1375789869 is about 1112.2029321535.

The spelling of 1375789869 in words is "one billion, three hundred seventy-five million, seven hundred eighty-nine thousand, eight hundred sixty-nine".